How to output multiple types of binary files in one file

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수환 김
수환 김 2022-3-24
编辑： Chunru 2022-3-25
I'm trying to output the DF to a binary file with one line. I'll show you a simple example.(In reality, it consists of hundreds of millions of rows of data.).
  1. A1 should be uint32_t, B2 should be float32, and C3 should be uint32_t.
  2. 'Little endian encoding' is required.
DF=
A1 B2 C3
1 7 13
2 8 14
3 9 15
4 10 16
5 11 17
6 12 18
The expected result after output is as follows.
Binary file =
1(uint32) 7(float32) 13(uint32) 2(uint32) 8(float32) 14(uint32) 3(uint32) 9(float32) 15(uint32) 4(uint32) 10(float32) 16(uint32) 5(uint32) 11(float32) 17(uint32) 6(uint32) 12(float32) 18(uint32)

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回答（1 个）

Chunru
Chunru 2022-3-24
编辑：Chunru 2022-3-25
Ran in:
x = [
1 7 13
2 8 14
3 9 15
4 10 16
5 11 17
6 12 18];
fid = fopen("test.bin", "w", "ieee-le");
for i=1:size(x, 1)
% 1(uint32) 7(float32) 13(uint32)
fwrite(fid, x(i, 1), "uint32");
fwrite(fid, x(i, 2), "float32");
fwrite(fid, x(i, 3), "uint32");
end
fclose(fid);
dir
. .. test.bin

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